Combined type-writing and computing machine.



A. s. DENNIS, COMBINED TYPE WRHING AND COMPUTING MACHINE.

APPLICATION "LED MIGJ. "l2.

Patented Oct. 7, l9i9.

4 SHEETS-SHEET l- I :V i u m mlm m A. s. osums. v COMBINE 0 TYPE WRIHNGAND COMPU'HNG MACHINE.

APPLICATION FILED MIGJ. "12

Patented Oct. 7, 1919.

4 MEETS-SHIN 2 A. S. DENMSL COMSIHED TYPE wnnmc Arm COMPUTING MACHINE.

m'ucmon FILED was. lu'|2-.

1,317,965. Patented 021;. 7,1919.

@ MEETS-SHEET 8- A. s. mums. COMBINED TYPE WRHING AND COMFUHNG MACHINE.

I 1 APPLICATION FILED AUGJ. I912. 1,317,965. Patented 0m. 7,1919.

SHEETS-SNEIT 4.

UNITED STATES ADOLPHUS S. DENNIlS, OF LAKEWOOD,

Tron on NEW YORKj To all whom it may concern:

Be it known that LAnou-rms S. DENNIS, a citizhn of the United States,residing, at Lakewood, in the county of Cuyahoga and State of Ohio, haveinvented certain new and useful Improvements in Combined I e- Writin Zand Computin Machines, of w uch the fol owing is a specification.

This invention relates to power-driven mac was in which relativestep-by-step denominational movement occurs between a master'gwhcel anda set of coll'lpfltll'lg wheels.

The invention is shown as applied to an Underii pod front-striketypewritiug machine, ahd embodies improved means 'for Qausing the masterwheel to be rotated by to provide a mechanism speedy, simple,iuexpensive, reliable, and not apt to get out of order, for promptlyconnecting the source of power to the master wheel, to drive the latterindependently, as the numeral keys are operated, varying amountscorrespondin to the particular keys actuated.

n the preferred-form of the invention,

e -independent clutches (all normally open) areilrranged loosely upon apower shaft,

and from these clutches extend rune separate trains of connections tothe numeral keys of the typewriter, its clutch, Whenever a clutch isclosed I) associated key, a mutilated gear which is connected to theclutch is caused to rotate with the shaft so as to rotate the masterwheel of the computing mechanism. The mutilated gears have gradednumbers of teeth corresponding to the value of the associated numeralkeys, so that the master wheel is rotated an extent determined by thekey operated. Each clutch tends normally to close, but is -i'estrainedfrom doing so by m ans of a. dog, and the dogis released bySpecification of Letters Patent. Application filed August a, 1912.strain No. 713,020.

computing mechanism, and particularly to The computing wheels ,st-roke,iclufch, a disconnection is automati ziflted between the key so that anykey may close -tomatically released from the n. 1., A consoncounnmnTrrE-wnmmo sun comrirrmc magnum Patented the depression of a numeralkey. The action of the clutchis very rom t, so'ithat the power shaft isconnecte to t e master wheel and rotates the same as far as out delay;and the master wheel may, in some cases, finish its rotation before thenil meral key is fully depressed. .Preferablyi the numeral keysets-thecomp'uting trai I 0 n into operation at the beginning of tiledOz:

stroke of the ke so that am 1e time ma allowed for the rotation of tl ie mas r w eel before-the carriage of the t th i pewri r its feedingmovement, whicli, of course, does begin until after 'theFkeyT starts 0.6

not usually its own return or upward movement. I

The interval during which the master wheel may be rotated larger part ofthe time durin wliicli ithe key is making its down stroke, ii 111;;which the finger of an involuntary pause at the conclusion 0down-stroke, and also a portion of'jthe time occupied in the returnstroke of the'key; that the operator iniithes e is, until the typewritercarriage is liberated 76 and begins to traveL Thisintervlal, jfroin nearthe beginning of the down-stroke ofthe key until the carriage gets underway, ufficient'jor the rotation of the master w eel through the maximumof nine orally where the'drive shaft is rotated ht high speed, as ispracticable in the pyesd'nt invehtion. K; I As soon as any key, duringits downefi'ects the closing of its a.

ly cfand the cluthh, so that the clutch may be automaticallyarrested oropened (independently of the her) at theconclusion of a singlerevolution thereof, 90 i which may even he pen before the key finishesits down-stro e, ifi the drive-shaft is rotating at very high s eed. Atan. rate, the mutilated gea will be revente from rotating moreth n onerevo ution with the 95 power shaft, egch if the key should be helddepressed longer than is necessary. Upon release of thkey, connection isautomaticall reestablished between the key and the clutch mechanism,said member itself key, so that the remainder of the cycle of operationsof PATENT OFFICE. 5

omo, Assmnon, BY unsn'n Ummnwoon comrormc MACHINE comrmr, or new YORK,

required with preferably includes the e time durpoints,

ciated 35 becoming auone starts to rotate, it wi i mesh with a wr-,

at on a shaft which is posiresponding to the master wheel, thusinsurtively gear ing a meral ey control and the master-wheel.

The clutch" by which the rotation of the mutilated gearsis controlledmay positivel seize b means of abutting members. Pre erablytlimlubcli'nomnally tends to seize, but is normally- .held a instseizing by a member moved (inc ective position by the operation ofa'numeral'ke Other features and advantages will hereinafter'g'appear.

Irithe accompanying drawings- -Figure 1 is a side elevation.

Fig. 2 is a section transversely of the machine. a j

Fig. Sis a front view.

Fig. 4 is a. plan view of the connections between the 'numeral'keys godthe drive shaft. Figufi is a di'agrammatic view, showing the iehit'io'nof the different numeral gears '6 and Tare details of the connectionsbetween the numeral keys and the clutches.

Fig. 8 shows a. clutch in its normal posi- Fig.9 shows a clutch justafter the moment of seizing.-

means which turns master wheel 16, so that Fig, 10' is a verticalscctionthrough a clutch and the main drive shaft of the computing mechanism. i

Alphabet. keys 1 and numeral keys 2 dcpress levers 3 to vibrate bellcranks 4, which swing typebars' 5 u The latter is mountet in a carriage7 ropclled by the usual spring barrel, Foot shown). The carriage has a.rack 8 to mesh with a pinion 9; which is'connected to' an cscapement\vhcel10. Dogs 11,12 control the movements ofsaid oscapemcnt wheel. Eachtype bar has aheel '13, so that it ma press rerwardly a universal bar Itwhicio cr-- letter feet mg" A separate train of mechanism connectseaehnumeral ,key to the power-driven .atnthe operation of the numeral key,the master wheel is positively .turned. Said train includes in eachinstance a rock arm ositive connection between the nuagainst a platen6..

17 arranged to be operated by the lever 3 of the particular numeral key;which rock arm 17 is fast on ashaft 18 carryin rock arm 19. Said rockarm 19 is arrang on the depression of its key toca'use a clutch 22 toseize by swinging a bar 20 out of the path of a pivoted dog 21 in saidclutch 22 so that a light spring 23 will cause said clutch to seize thewar-driven shaft 24, and throu h a muti ated gear 25 on said clutch,said 5 aft 24 turns master wheel 16.

The connections between said master wheel and each of said mutilated.geersincludef a a gear 26 alined with each of said mutilated gears andfast on a main computing shaft 27, which shaft carries bevel gear 28,mesh ing with bevel gear 29 on shaft 30, which shaft in turn carries abevel meshing with a bevel gear 32 fast on the master wheel shaft 33. r

The clutch 22 seizes shaft 24 by .means of an arm 34 formin acontinuation of dog 21, which is normefily pressed inward by means ofthe light s ring 23 so that the hook 36 on said arm W1 1 in tercept theteeth 37 on said power-driven shaft. As the numeral ke v2 is' depressed,

it swings rock arm 19 so t at it' strikes bar 20, and it will be notedthat the pawl 38 on the end of said rock arm 19, which is the part thatactually contacts with said bar 20, will engagesaidbar at its end andonly momeritardy, that is, untilpawl BSslips oil from bar 20, as shownin dotted lines at Fig. 6',

permitting the key to finish its printing stroke, and releasing bar 20from the control of the ke and a spring 39 will at once return sai bar20 after it is so released so that the bar 20 is immediately returnedinto thepath of dog 21, independently of the key.

When the clutch 22 has completed one revolution, said clutch willaccordingly be auto matioally ed or released by said dog striking saibar 20. On the return stroke of the keyixhe pawl 38 may yield or slidebackward by its slots 40 on pins 41 to pass said bar 20, and a spring 42draws it again into effective position when it has said bar. on itsreturn stroke under the to ue of'coil sprin 35. Regarding pawl 38'tucreason thatflt sli s oil from 20 when a ey is goin down, is )ecause20 descends in a vertica path, whereas 38 moves diagonally downward andbackward about ivot 18, until 38 draws back oil from20, as a IOWII bythe dotted lines. thus interrupting the connection the power-driven icoasscd The arm 17 follows the key ever 3 between the key and thecomputingtrain.

The mutilated gear 25 whichis controlled by the clutch, carries teeth 43proportionmutilated gear 25 is attached to the cup member 44 of saidlutch 22 by means of screws 45, so that it oves as a unit therewith, andsaid clutch may include a cover 46 for its .face.

The power for driving said shaft 24 may be a constantly driven electricmotor 47 geared directl thereto. so as to obtain a speed, prefers. lysu'fiicient to complete the com utation as soon as the numeral key reaces its lowest point of depression.

It--will be noted that the bar is-arranged'to be operated by the numeralkey very early in its depression, and that thereby the touch of the keysneed be very slightly affected by the computing mechanism. To

, further lighten the touch of the keys, the

.amsm' to positively seize the lever 3 is preferably arranged to movethe rock arm 1? by means of a roller 48 fast on a pin 49 on said arm.

The master wheel 16 is arranged to regis:

ter with and turn seriatim the dial or com puting wheels 50 of atota-lizer 51, and for this purpose, the totalizer 51 may be arranged totravel on rollers 52 across the front of the machine, as shown in Fig.2. step-b step with the typewriter carriage. For t is purpose therepreferably extends from the typewriter carriage an arm 53 which is ar toenga c said totalizer so that it will a ways trave with said'typewriterThe dial wheels 50 need not be directly by the master wheel 16, but arepreferably operated by saidmaster wheel through-intermediate gears 54and idle 55, there being one of said intermeand idlegears for each dialWheel.

It will be seen that when any numeral key is depressed, it causes itstrain of mechwet-driven shaft 24 and thus causes this s aft topositively turn the master wheel. The wholeload of operating thecomputin mechanism,

except fontripping the clutc ice, is taken" care of by the ower-drivenshaft, and there-V fore, the tone of the numeral keys may be exceedinglylight. It will be seen that each operation of the computin mechanismreturns the parts to normal i le position, without reversing itsmovement of any part except the rock arms.

In Fig. 5 is diagrammatically shown the arrangement of mutilated gearsfor each of the numeral keys from 1 to 9, with reference to the maincomputing shaft 27. It will be vnoted that while the mutilated gearsvnormally have their teeth clear of the gears 26, the first tooth oneach mutilated gear is arranged to almost immediately mesh with "thegear 26 on the main computing shaft 27 so as to obtain a prom t actionof the computin mechanism. T is renders it impos- Sible or the machineto be operated so fast uating element, each,

said key to normal claim:

1. In a combined typewriting and ,com-

. puting machine. comprising aset of typeavingthus described myinvention, I y

controlling number keys and ower-driven' actuating mechanism contro edthereby said actuatin mechanism including a set of difi'erentiat eachkey, a drivin shaft and a set of normally ineffective c utyhes, one foreach valcapable of being rendered effective to connect its respectivevaluating element to said shaft, the combination with one of said keysand the clutch associated with the 'eorrespondin valuating element, of aclutch-controlling ey-connection normally-efi'ectivc on operation ofsaid key to cause said clutch to connect said valuatlng element to saidshaft for a predetermined cycle of movement, said connection includingdisabling means for breaking the cooperative relation between thekey-controlled parts and the clutch-o erated arts when said clutch hasbeen t us rcn ered efl'ective and prior to threturn of said key tonormal os1tion, the relation between said clutch an arts 'of said keyconnection, when thus disabled, being such that said key,-and the partsconnected therewith, 'me

be caused to complete their movements an' return to normal position freefrom control b said clutch-operated arts, said relation valuatingelements, one for nected parts, are rendered incapable o initiatidgasecond cycle of movement of s'aid clutch-operated parts prior to thereturn of sition.v 2. In' a combin puting machine comprising a'set oftype controlling number keys and wer-driven actuating mechanism controedthereby, said actuatin mechanism including a set of difi'erentiavaluating elements, one for each key, a drivin shaft and a set ofnormally ineffective c utches, one for each. va'luating element, eachcapable of being rendered efi'ective to connect its respectivevalua-ting element to said shaft, the combination with one of said keysand the clutch asst ciated with the correspondin valuating element, of aclutch-controlling ey-connection normally efl'ectlve on operation ofsaid key to cause said clutch to connect said valuatmg element to saidshaft for a predetermined cycle of movement, said connection includingdisabling means for breaking the cooperative relation between thekey-contypewriting and comnected parts, are rendered incapable oinitiatin a second cycle of movement of said to normal tion, therelation between said clutch an arts of said key connection,

when thus isa'bled, being such that said key, and the connectedtherewith, may be caused to complete their movements and return tonormal' position free from control b said clutch operated arte, saidrelation so being such t at said ke'y, and he conclutc operated partsprior to the return of said key to normal position said key-c0nnectionalso including means for reestablishin the o tive relation between saidkey and said utch on a. return of said key to normal position.

3. In a combined vtypewriting and computin machine comprising a set oftypecontro ling number keys and power-driven actuating mechanismcontrolled thereby, said actuating mechanism including a set ofdifferentiated valuating elements, one for each key a driving shaft anda set of normally ineli'ective clutches, one for each valuatin element,each capable of being rendered e -v fective to connect its respectivevaluating element to said shaft, the combination with one of said keysand the clutch associated with the corresponding valuating element, ofa. clutch-controlling key-connection nor mally iefi'ective on operationof said key to cause said clutch to connect saidvaluntiug element tosaid shaft for a predetermined I cycle of movement, SitllL connectionincluding mutually coiiperiitive elements normally in engaging relation,which are caused to be moved out of such engaging relation as a part ofthe operation of said keyeonnection by said key toi-cnder said clutcheffective, thus disabling said key-connection prior to the return of theoperated key to its normal position, said connection else includin meansfor moving "lino-of said parts when (iseonnectcd to a osition such as-toprevent reiingugeinent with: the-other wit-liout first returning saidkey! to iio'mnal posh tion, the relation between ,said clutch and partsof said key eminectiomxwhen thus-disabled, being such" that said key,and the parts connected therewith, maybe caused to complete theirmovements and return to normal position free from control by said clutchoperated parts, said relation also being such that said key, and keyconnected parts, are rendered incapable of initiating a seo'ond'cycle ofmovement of said clutch operated parts priortolhe return of said key tonormal position.

4. Ina combined typewriting and computing innchine comprising a set oftypecontrolling number keys and powend'riven min cycle of movement, saidconnection including mutually ieoiiperative elements normally in engaing relation, which are caused to move: out otsucli engaging relation asa pai't-ot'thc operation of said key-connection bsaid key to render saidclutch effective, t iiis disabling said key-connection' prior to thereturn of the operated key to its normal position, said connection alsoincluding means for moving one of said pants w-lien .diseonnected to aposition such as to prevent reiingagement with the other withoutfirst=retirrning said key to normal position, said disco aging partsbeing provided'with means or rei stnblisliing engaging relation onreturn of said key-eontrolled parts to normal position, the relationbetween'sa-id clutch and parts of said he connection, when thusdisabled, being suc i that 'said key, and the parts connected therewith,

:eurh key, a driviu shaft and a set of nor- '-imilly iuellcctivc ciitches, one for each valdating eloi iont, each capable of beingrendered nll'ecti'i'e to connect its respective valu: siting element tosaid shaft, the combination with one of said keys and the clutchassociatedwith the corresponding valiuiting elo ment, of aclutch-controlling mechanism, siiid mechanism comprising a controllinelement normally ell'ective to maintain such clutch ineffective and itsvaluating element in annual position, an operating elemei'it connectedtosuid keyand normal] in engaging ielation with said control ingelement, so that by operating said key said controlling element may bemoved to render ower-di'iven int-uniting ii'ie/chnnisin contro edthereby, -:said nctuatin r mechanism including a set ofslll'lfflelltlllfitlt valuating elements, one for uatigg element to saidshaft for a predetersaid clutch effective, the relation between saidcontrolling element and said operating element being such that they willmove out of en ging relation during the operation ofsand mechanism, torender said clutch effective and before the return of said key to itsnormal positioni and means for restoring said controlling e ement, whenthus disconnected to its normal osition, so as to render said clutchineffective at the completion of its cycle of movement and againmaintain said valuatin element in its normal position, the re ationbetween said clutch and its controlling mechanisn'i, when thus disabled,being such that said key, and its operating element, may be caused tocomplete their movements and return to normal position free from controlb said clutch operated parts, said relation also being such that saidkey, and its operating element, are rendered incapable of initiating asecond cycle of movement of said clutch operated parts prior to thereturn of said key to normal position.

'6. In a combined typewriting and computing machine comprising a set oftypecontrolling number keys and power-driven a'ctuating mechanismcontrolled thereby, 3 id actuating mechanism including a set of difl'erentiated valuating elements, one for each key,v a driving shaftand a set of nor-- mally ineit'crlive clutches, one for each valuj atingelement, each capable of being rendered effective to connect itsrespective valuating element to said shaft, the combination with one ofsaid keys and the clutch associated with the corresponding vnluating element, of a clutch-controlling mechanism, said mechanism comprising acontrolling element normally efl'ective to maintain said clutchineffective and its valuatin element n normal position, an operatin eement connected to said key and norma y in engaging ing relation duringthe o eration of said mechanism, to render sai clutch effective andbefore the return of said key to its normal position, means forrestoring said controlling element, when thus disconnecterhto its normalposition, so as to render said clutch ineffective at the completion ofits cycle of movement and again maintain said valuatin element in, itsnormal position, the relation between said clutch and its controllingmechanism, when thus disabled, being such thatsaid ke andits operatingelement may be caused to complete their movements and return to normalposition free from control b said clutch operated parts, said relation9. so being such that-said key and its operating element are renderedincapable of initiating a second c ole of movement of said clutchoperate parts priorto the return of said ke to normal position, andmeans for reiista lishin the normal engaging relation between sai controlling element and its operating element on a return of said key toits normal po-'

